Android HTTP connection and Download Images from Server

Android HTTP connection and Download Images from Server 

1.Main.java 

1. package android.test;  
2. import java.io.IOException;  
3. import java.io.InputStream;  
4. import java.net.MalformedURLException;  
5. import java.net.URL;  
6. import java.net.URLConnection;  
7. import android.app.Activity;  
8. import android.content.Context;  
9. import android.content.res.TypedArray;  
10. import android.graphics.Bitmap;  
11. import android.graphics.BitmapFactory;  
12. import android.os.Bundle;  
13. import android.view.View;  
14. import android.view.ViewGroup;  
15. import android.widget.BaseAdapter;  
16. import android.widget.Gallery;  
17. import android.widget.ImageView;  
18. public class Main extends Activity {  
19.     private Gallery m_gallery;  
20.     private String[] m_imageURLs = { "http://www.lvyou114.com/member/1971/UploadFile/200691217738739.jpg",  
21.             "http://img5.3lian.com/gaoqing/01/02/185.jpg",  
22.             "http://www.wallcoo.com/nature/Fall_Colors/images/1Fall_Colors_07.jpg",  
23.             "http://pic1a.nipic.com/2008-10-15/2008101585324870_2.jpg",  
24.             "http://www.zjj-hc.com/view/jp/%E5%BC%A0%E5%AE%B6%E7%95%8C%E6%99%AF%E8%89%B2.gif" };  
25.     /** Called when the activity is first created. */  
26.     @Override  
27.     public void onCreate(Bundle savedInstanceState) {  
28.         super.onCreate(savedInstanceState);  
29.         setContentView(R.layout.main);  
30.         m_gallery = (Gallery) findViewById(R.id.myGallery);  
31.         m_gallery.setAdapter(new MyInternetGalleryAdapter(Main.this));  
32.     }  
33.     class MyInternetGalleryAdapter extends BaseAdapter {  
34.         private Context m_context;  
35.         private int m_nGalleryItemBG;  
36.         public MyInternetGalleryAdapter(Context c) {  
37.             m_context = c;  
38.             TypedArray arr = m_context.obtainStyledAttributes(R.styleable.myGalleryStyleable);  
39.             m_nGalleryItemBG = arr.getResourceId(R.styleable.myGalleryStyleable_android_galleryItemBackground, 0);  
40.             arr.recycle();  
41.         }  
42.         @Override  
43.         public int getCount() {  
44.             return m_imageURLs.length;  
45.         }  
46.         @Override  
47.         public Object getItem(int position) {  
48.             return position;  
49.         }  
50.         @Override  
51.         public long getItemId(int position) {  
52.             return position;  
53.         }  
54.         @Override  
55.         public View getView(int position, View convertView, ViewGroup parent) {  
56.             ImageView imgView = new ImageView(m_context);  
57.             try {  
58.                 URL url = new URL(m_imageURLs[position]);  
59.                 URLConnection conn;  
60.                 conn = url.openConnection();  
61.                 conn.connect();  
62.                 InputStream in = conn.getInputStream();  
63.                 Bitmap bmp = BitmapFactory.decodeStream(in);  
64.                 in.close();  
65.                 imgView.setImageBitmap(bmp);  
66.             } catch (MalformedURLException e) {  
67.                 e.printStackTrace();  
68.             } catch (IOException e) {  
69.                 e.printStackTrace();  
70.             }  
71.             imgView.setScaleType(ImageView.ScaleType.FIT_XY);  
72.             imgView.setLayoutParams(new Gallery.LayoutParams(200, 150));  
73.             imgView.setBackgroundResource(m_nGalleryItemBG);  
74.             return imgView;  
75.         }  
76. 
    
77.         public float getScale(boolean focused, int offset) {  
78.             /* Formula: 1 / (2 ^ offset) */  
79.             return Math.max(0, 1.0f / (float) Math.pow(2, Math.abs(offset)));  
80.         }  
81.     }  
82. }  

2. AndroidManifest.xml

1. <?xml version="1.0" encoding="utf-8"?>  
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"  
3.       package="android.test"  
4.       android:versionCode="1"  
5.       android:versionName="1.0">  
6.     <uses-sdk android:minSdkVersion="7"></uses-sdk>  
7.     <application android:icon="@drawable/icon" android:label="@string/app_name">  
8.         <activity android:name=".Main"  
9.                   android:label="@string/app_name">  
10.             <intent-filter>  
11.                 <action android:name="android.intent.action.MAIN" />  
12.                 <category android:name="android.intent.category.LAUNCHER" />  
13.             </intent-filter>  
14.         </activity>  
15.     </application>  
16.     <uses-permission android:name="android.permission.INTERNET"/>  
17. </manifest>  

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